Windows Server 2003 (the OS formerly known as Windows.NET Server) was
released on April 24, 2003 and comes in 3 forms: Web, Standard, and Enterprise.
Windows Server 2003 is similar to Windows XP but with extra server stuff
and without the unprofessional themes. There are reportedly some minor
differences under the hood from Windows XP. Windows 2003 Server also identifies
itself as Windows NT 5.2 whereas XP is NT 5.1 so this is a distinctly different
version of Windows.

The Server 2003 installer is exactly the same as the one from Windows
XP, just colored gray to match to OS. Windows 2003 Server has Product Activation,
but it is not always used depending on which version it is.

You will quickly find that Windows Server 2003 is much more strict
than XP or previous NT server products.

The boot screen is just like that of XP, except, again, colored gray
instead of blue (XP Pro) or green (XP Home).

The login screen still does the same old "Ctrl-Alt-Delete" thing...

If you had a "unexpected shutdown" (meaning that you got pissed at
the machine and pushed the tower onto the floor, thereby yanking out the
power cord), then you have to tell it what happened before it will let
you logon.